How to publish a children’s picture book on KDP with AI

Each step below comes with the numbers KDP checks, worked out for a 32-page 8.5 × 8.5 in paperback, from choosing the format to answering KDP’s AI questions. If you make the book with kdpbook, these settings are applied for you; they are still worth knowing before you upload anything.

1. Which format and trim size should a picture book use?

Most self-published picture books are premium color paperbacks in a square trim, plus a Kindle eBook. The classic size is 8.5 × 8.5 in. Because the art runs to the edge of the page, the book uses bleed: each interior page is set up at 8.625 × 8.75 in and trimmed after printing. To compare it with the other sizes KDP prints, see every trim drawn to scale, with its page limits, on the trim sizes page.

• Premium color is the only KDP ink that suits full-page illustrations. Standard color is cheaper but meant for text-heavy books and needs at least 72 pages.
• Hardcover needs 75 pages or more and doesn’t come in square sizes, so it rarely fits a picture book.
• KDP doesn’t print board books (thick card pages). A toddler book is sold as a square paperback instead; say so in the description.

2. How many pages does a picture book need?

At least 24: that’s KDP’s paperback minimum, and every page counts, including the title page, copyright page and any blank page. The traditional 32 pages come from offset printing and leave room for about 14 spreads of story after front and back matter. Plan the story spread by spread: one scene per spread, a page turn at every surprise, and one to four short sentences per page. How many words in total? See children’s book word count by age.

Keep text inside the safe area and away from the gutter, and place it on a calm part of the illustration so it stays readable. A “This book belongs to” page and a short dedication are common in children’s books.

3. How do you keep AI illustrations consistent?

Draw each main character once, on a character sheet, and reuse that sheet as the reference for every illustration, all in one style: the same fox, the same scarf, the same colors on every page. Consistency is the hardest part of an AI picture book, and this is the reliable way to get it. That’s how kdpbook works: characters are locked before the pages are painted, and you can redraw any page that drifts. The character consistency guide covers the method in detail.

Illustrations must be at least 300 DPI at their printed size. For a full-bleed page on this trim, that’s about 2588 × 2625 pixels. Never put text inside the images: set it as real text on the page so it stays sharp and editable.

4. Build the print files

• Interior PDF: every page at the bleed size, art extended into the bleed on the outside, top and bottom edges, fonts embedded.
• Cover PDF: back, spine and front on one page. A 32-page book has a very thin spine and no room for spine text; KDP only prints it on books with more than 79 pages. Use the cover size calculator for the exact size.
• Run through the publishing checklist before you upload.

5. The Kindle edition

Picture books need a fixed-layout Kindle eBook, where every page keeps its design. KDP retired Kindle Kids’ Book Creator in 2025; today you upload a fixed-layout EPUB or a file made with Kindle Create. Text should be large enough to read on a 7-inch tablet without zooming. The details are in how to make a fixed-layout Kindle picture book.

Picture-book files are large, which matters for royalties: the 70% option subtracts a delivery cost per megabyte. At $4.99 and 12 MB, 70% pays $2.23 after a $1.80 delivery cost, and 35% pays $1.75. Very large files can make 35% the better option, so compare both in the royalty calculator.

6. Price and royalties

On Amazon.com, a 8.5 × 8.5 in premium color paperback costs a flat $4.20 to print up to 40 pages, so 24, 32 and 40 pages all cost the same. The minimum list price is $8.40. At $9.99 you earn $1.79 per copy; below $9.99 the royalty rate drops from 60% to 50%. See how to price a book on KDP.

7. Publish: disclosure and listing

• In the Content tab, answer Yes to AI-generated content and declare the text and images (the cover counts). Read the AI disclosure guide.
• Set a reading age (for example 3–5) that matches the text, and choose categories that describe the story honestly.
• Use a free KDP ISBN for the paperback: picture books are not low-content books.

Want to skip the setup? The AI picture book generator starts at 8.5 × 8.5 in, premium color, 32 pages with bleed, and exports all of the above.

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